E-scooters
NIU
Repair guides, troubleshooting and the official manuals for NIU. Pick your model for everything that applies to it.
NIU guides
- NIU KQi scooter troubleshooting: dark dashboard, charging, brakes and error codesTroubleshootingSafe checks for NIU KQi kick scooters, from a dark dashboard and charger tests to brake tension, 45 to 50 psi tires, stem wobble, E-Save mode and error codes 02, 03, 41 and 42.
- NIU KQi scooters: battery won't charge, charger light red or offTroubleshootingNIU's test: plug the charger into the wall without the scooter. Green means the charger has power. Red or no light means the charger is likely damaged. Clean the charge port first.
- NIU KQi scooters: error 02 on the dashboard (brake fault)TroubleshootingError 02 on a NIU KQi dashboard is a brake fault. NIU's fix is to check that the left and right brake lever wiring is plugged in firmly, then contact after-sales.
- NIU KQi scooters: error 03 or the thumb throttle does nothingTroubleshootingError 03 is NIU's accelerator fault, usually a loose thumb throttle plug. If there is no code, check activation and custom mode in the app. A motor that stalls points to the controller.
- NIU KQi scooters: error 41 after storage (battery over-discharge) and error 42TroubleshootingError 41 shows when a KQi was left uncharged for weeks or months, and NIU's fix is to charge it straight away. Error 42 is a battery communication fault that goes to NIU after-sales if it stays.
- NIU KQi scooters: won't turn on or the dashboard stays darkTroubleshootingA KQi that won't power on, especially the first time, often has one of the two cables in the stem unplugged, NIU says. A shifted or stuck power button is the other easy cause.
- NIU KQi3 Pro, Max and Sport: disc brake squeals or rubsTroubleshootingDisc brake noise on a KQi3 is common at first, NIU says. Its fix is to check the disc, loosen the two caliper screws, squeeze the brake to center the pads, and retighten to 4.5 Nm.
- NIU KQi3 Pro, Max and Sport: flat tire or tire keeps losing airTroubleshootingThe KQi3 uses tubeless 9.5 x 2.5 tires. NIU's answer to a puncture is a new tire, fitted by you or a service partner, kept at 45 to 50 psi.
Models
- KQi 100FE-scooter, 5 model guides
- KQi 100PE-scooter, 5 model guides
- KQi 200FE-scooter, 5 model guides
- KQi 200PE-scooter, 5 model guides
- KQi 300PE-scooter, 5 model guides
- KQi 300XE-scooter, 5 model guides
- KQi AirE-scooter, 5 model guides
- KQi Air XE-scooter, 5 model guides
- KQi Youth+E-scooter, 5 model guides
- KQi1 ProE-scooter, 5 model guides
- KQi1 SportE-scooter, 5 model guides
- KQi2 ProE-scooter, 5 model guides
- KQi3 MaxE-scooter, 7 model guides
- KQi3 ProE-scooter, 7 model guides
- KQi3 SportE-scooter, 7 model guides
Troubleshooting that applies to most models
- Battery dies fast or range droppedTroubleshootingYour e-bike used to go further on a charge. How to tell normal wear and riding conditions from a battery or charger problem.
- Battery won't chargeTroubleshootingThe charger light doesn't change or the battery won't go up. Safe checks on the charger, the outlet and the port, and when to stop.
- Display blank, flickering or frozenTroubleshootingThe handlebar display won't show anything, flickers or freezes. Usually a plug, the battery, water or the display itself.
- E-bike or scooter won't turn onTroubleshootingNothing happens when you press the power button. Work through the battery, the key and the plugs before assuming the worst.
- Motor cuts out or power comes and goesTroubleshootingThe motor stops helping on and off, over bumps or on hills. Usually a loose connection, a brake sensor, heat or a tired battery.
- My e-bike or scooter got wetTroubleshootingRode through heavy rain or a deep puddle, or washed it with a hose? What to do now, and the signs that water got in.
- Throttle not workingTroubleshootingThe thumb or twist throttle doesn't move the bike or scooter. Simple checks before the throttle or controller gets replaced.